I have a 64-bit Windows 7 Home desktop, and a 64-bit Windows 7 Enterprise laptop on the same homegroup. They worked flawlessly until very recently. I took my laptop with me on a trip, and when I got back, I started having problems with the homegroup. Whenever the laptop goes to sleep or hibernates or is rebooted, it is removed from the homegroup, as it should be. When I try to wake it up, the computer is connected to the internet via the proper wi-fi network, so that's not an issue. However, when I try to use the homegroup, one or both will be unable to recognize the other, despite them realizing they are both in the "Myname Home" homegroup. I have tried fiddling with the firewall and disabling upnp. Please help.